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Fix a crash due to a broken Book::open()

Browse Source 
Bug introduced in 9dcc2aad98

We can be asked to open a non-exsistent file,
in this case we should gracefully handle the
case and silently return instead of exiting.

Bug discovered and bisected down by Joona.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-12-04 21:19:22 +01:00
parent 8a858aea34
commit 97a6e1559e
1 changed files with 12 additions and 10 deletions
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22
src/book.cpp
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@@ -365,18 +365,20 @@ void Book::open(const string& fName) {
fileName = fName;
ifstream::open(fileName.c_str(), ifstream::in | ifstream::binary);
if (is_open())
{
// Get the book size in number of entries
seekg(0, ios::end);
bookSize = long(tellg()) / EntrySize;
seekg(0, ios::beg);
// Silently return when asked to open a non-exsistent file
if (!is_open())
return;
if (good())
return;
// Get the book size in number of entries
seekg(0, ios::end);
bookSize = long(tellg()) / EntrySize;
seekg(0, ios::beg);
if (!good())
{
cerr << "Failed to open book file " << fileName << endl;
exit(EXIT_FAILURE);
}
cerr << "Failed to open book file " << fileName << endl;
exit(EXIT_FAILURE);
}